Filtering apparatus.



D. J. KELLY.

FILTERING APPARATUS.

APPLICATION FILED MAR.3,1910.

Patented May 10, 1910.

2 SHEETS-SHEET 1.

D. J. KELLY.

FILTERING APPARATUS. APPLICATION FILED MAR.3,'1910 Patented May 16, $9M.

2 SHEBTB-BHEET 2.

- Hiiiiih @Hoznoq ki mimnii. A3,. iil llkJ KIEIJLY GQEMFANY, SALT LAKE CI Y, UTAH, A CORPQEA'EIOW,

Application filed March 3, 1910. Serial liloufi llllfi To all whom may concern:

Be it known that 1, DAVID J. KELLY, a citizen of the United States, residing at Salt Lake Gity, in the county cf Sell Lake and 5 State Utah, have invented certain new and us ful lniprcvements in Filtering Apps mule-{Pil a e 1%,) cf which the following a specification.

This ifenti'on relates to certain improve- {i=5 merits ,n' apparatus designed especially to sepsrcie'sfimes frcm which precicus metals here heendissclved end the liquid which liclds the precious metals in scluticn; While the inventien is particularly useful for met- 5 allurgicel Work, I d e-not limit its use to this particular field of infection since the mechanism hereinafter described may be embodied in other types of apparatus and may, in fact,

be employed in other fields and Wherever-the g e sepereticn cf? solids from fluid matter is de sired, T

The essential object of my inven ion is to eutcn eticeliy govern the air exhaust and feed in wring 'epparetus and to thereby relieve the c ceretcr of the necessity of menipuleting valves by hand lac-insure proper" conditions 015 air pressure st all times.

in the opercticii cf filters and particularly hese c'l the type hereinafter mentioned, it"is tc clcse the air xhaust when the filtezflenlr is full of slimespulp or wash schitions, or when it contains other matter to he separated by filtration, and also to supply proper pressure to displace surplus liquids and tcholcl the cakes of solid matter which accumulate on the surface of the filter, in place during the emptying of the tank filter is contained. 7 ll ith Luis shore and cthcrchjects in View, is my present invention consists of the parts, and the ccnstructicns, arrangements and ccrihinstions of parts, which 1 will herein ftcridescrihe claim.

in the ececmpenying drawings. forming e5 pert of this specification end in which similar letters reference indicate like parts in the several yiews, l is e side elev eticn of Li well knewn apparatus for separating or filtering slimes, enihodying the present in- 59 vention. is zen-enlarged vertical sectional View of the a'ir-gcverriiisg mes-ins, showing r in elevation; Fig. 3 is an end View of the einreguletcr. In a prior patent granted tome Mai-ch 13/06, No. 815,621, encln' my fcrinerli stent No. 86%,308, dated ling. 7/07, I have disclosed a separating or filtering apparatus designed-particularly for metallurgical Work and for purposes of illustration 1' have en1- ployed thistype of apparatus in the present 6 drawing. The apparatus or" thepateuts be fore named includes a closed tank, 'll),.'p're;terehly set at an incline and having a. generel cylindrical form although the cross-sectional character of the tank is immaterial. This tank has one of its ends, preferably the higher cne,'ll, permanently closed while the opposite or lower end is capable or being opened and closed for the purpose of intro ducing and removing suitable filter frames, 1.2,which are indicetedbydotted lines in 1. The loweiflhead, 13, of the tank may'cerry appropriate rollers or-Wheels, 14, st Ell-1c sides designed to travel upon an in'clined'trsclewey, 15, and, said head may be cennectecl to e. fiexihleconnection, 16, and counter-Weight, '1'? in the manner fully shown and described in my aforesaid prior Patentl lc. 815,021.

"Suitably attached to and extending above the upper. and higher end. of the tenlr, 10, is a vertical cylinder, A, in which is ;repriately nountecl a float, B, seirl fleet being closed its upper end and being open as the battens and being, preferably, of stzmtial vertical height. The lower end cf the cylinderis in open connection with the upper rear end of the tank, 19, end said cylinder carries spider or ring, to which is fixed a vertical red, C, which forms 2. guide for the float in its rising railing W movements.

Fixed t0 the upper closed end oij' the heat is a rod, D, which projects three an appnopricle guide, 15, in the upper portion. of the cylinder and carries upon its upper end. J valve, ll l, which seats upwardly an appropriate valve seat .i'crmecl in cylinder to thereby open and close ccmn" "ation between the upper and. lower portions of the cylinder, as will hereinafter 7190 scribe.

, llfithin the upper portion of the c.- shc've the Valve, M, is a downweidly puppet-valve, E, the stem of which extends through a cap, I6, on the upper end .e cylinder; and engages 2L lever, 1'3, one end cfhich is pivotally connected to the cap orto some suitable stationery point While the 013'" ppsite portion carries a Weight, F, Whi adjusts-isle along the lever in any Well he n 1 manner, said weight serving as a counterbalance to return the puppet-valve to its seat after it has been raised by pressure within the cylinder as I will presently describe. The upper end of the cylinder is also provided with. suitable. perforations, a, for the escape of air which has passed the puppet valve.

, Suitably supported upon the cylinder at one side thereof, is a dash-pot which sists of a cylindrical or other vessel, H, in which operates a piston, I, having a projecting stem, 1, the upper end of which may be provided with a slot as shown. The stem of the dash-pot is connected by a pin, 18, or other means with a lever, J, one end of which is connected with the stem, of a suitable valve, K, located in the pipe, 6, which supplies and regulates the air-feed to the tank, 10, said lever, J, being provided with a weight, J, which is adjustable on the lever so as to control the opening of the valve, K, and thereby supply any desired air pressure to the tank.

The lower end of the filter tank, 10, is connected with the feed line pipe, Q, by which the material. is supplied to the tank and which pipe connects with a compressed air or; other pressure delivery pipe, X, in much the same way as disclosed in my aforesaid Patent'llo. 815,021, but it is obvious that the geinent of the feed of material to the tank may depart from that disclosed in the prior patent and herein shown without attesting the operation of the aii-goveri'1ing devices, which form the essential part of the present invention.

The cylinder, fit, being secured to the tank at the l d .st point of the latter, it will manifest that as the tank fills with SllIIlES,

pulp or other material to be separated the air which accumulates in the upper portion of the tank is displaced and enters the cylindcr, .il, and through the same past the valve, M, and the puppet-valve, E, and. passes out thrmigh the perforations or openings in the upper portion of the cylinder above said puppet-valve, the float, B, being normally in a lowered position and the valve, 'M', carried by the float being withdrawn from its valve seat to permit the air to escape thereabout and. lift the puppetvalve.

WVhen the tank becomes full of the material to be separated, the float, B, is caused to rise and to thereby seat the valve, M, so to cut off communication between the cylinder and the atmosphere, and the hydraulic pressure in the filter tank, 10, compresses the air in the cylinder, A, andthis compressed air is delivered through a pipe, 20, into the dash-pot below the piston thereof with the result that this piston is caused to move upwardly at the same time lifting the counterweight lever, J, and closing the valve, K,

earner and thereby shutting 0d communication through the air pipe, Z), and which pipe is provided with an air valve, N, as shown in Fig. l and which is now opened and remains in' an open condition until thetank is opened to discharge the accumulated cakes, the valve, K, now regulating the air feed.

If the hydraulic pressure is reduced after the tank, 10, is full of material, the pressure in the tank falls when the weighted lever, J,

acts upon the stem of the piston, I, to therer by force the piston down, because of the diminished pressure in the cylinder, A, and to open the air controlling valve, K; this reduction in pressure also causes the float to drop so that its valve, M, will be moved from its valve seat. On the pipe line, Q, is a check valve, P, which prevents the liquid from running out of the tank. The compressed air entering the tank creates a back pressure on the piston, I, of the dash-pot, which, when strong enough to overcome the weight upon the lever, J, lifts this lever and again closes the an regulating valve, K. By the .means described, a constant air pressure is maintained in the tank in which the filtering operation occurs, and any desired air pressure may be supplied to the tank by proper adjustment of the Weight on the leve J.

The weight on the stem of the valve is made sufficient to prevent this valve from blowing off or lifting from its seat until the pressure in the tank is slightly more than is needed to lift the piston of the dash-pot and thereby close the air regulating valve, K. When the hydraulic pressure is restored, the check valve, P, is opened and the accumulated air in the filter tank, 10, escapes through the puppet-valve as herein described; when the tank is again full the float acts to close the valve, M, and cause the accumulated pressure in the cylinder to actuate the dash-pot and regulate the position of the valve, K. ln the same manner air is supplied to the litter tank when the valve, X, opened to drain the tank of surplus unfiltered slimes pulp or surplus wash liquors, and the solid material which cakes upon the sides of the filter in the manner described. in my former patents is held in place, and air is exhausted at a given pressure when the tank filling.

From the above description it will he ap-, parent that the prose t invention automatically exhausts displaced air at desired pressure when the filter tank is filling with a liquid; that it automaitcally closes the eshaustvalve when the tank is full, and that it automatically supplies air atany required pressure to the tank when the hydraulic pressure in the tank ceases, thereby reducing. the manual labor heretofore required for such purposes and'insuring against poor manipulation and its consequences.

puppetlhlaving thus described. my invention what l claim. as new and desire to obtain by Letters Patent is: i

1. The combination with a hydraulic filtering apparatus, of a container connecting therewith and through which air displaced in apparatus is normally peromitted to escape and means controlled by the hydraulic pressure in the apparatus for admitting prcssureinto the apparatus to supplement the hydraulic pressure.

2. The combination with a filter tank of connecting" therewith and automatically iausting displaced air when the tank is .h g, and means for autolnaticall supnl air under pressure to the tank to haul lain substantiall a uniform pressure therein when the hyc raulic pressure in the pressure, and adapted to admit an auxiliary to the tank when the hydraulicpressure the tank decreases.

filter tank adapted to receive liquid under "pressure, said tank having means for automatically exhausting displaced can" when the tank is filling and having also, mechanism for automatically supplying compressed-air to the tank in. response to a deficient hydraulic pressure.

A hydraulic filtering, apparatus comprising a tank to receive liquid, said tank having when the tank is filling; an cry fluidprcssure mechanism connecting with the tank and including a fluid-pressure conductor and valve controlling the admission of the fiuid-pressure-to the tank; and means for automatically imparting an opening and closing movement to the valve in response to variations in the tank pressure,

6. filtering apparatus comprising a tank intowhich liquid is admitted under means for exhausting displaced ai when the tank is filling, said means including a displaced-air receiver connecting with the tank and a valve controlling the passage of the air throngs the receiver; means with in the receiver and actuated by the hydraulic pressure in the tank for cutting oil the escape of the displaced air l'rom the receiver, and compressing air; a coinair feed'pipe connecting. with said receiver having a controlling valve, and.

means connecting with the receiver and actuated hy the hydraulic pressure in the tank for opening the valve in the air-feed pipe in response to a reduction in the tank pressure.

The coi'nlxination with a filtcrtank and the tank by increase of hydraulic pressure in means for exhausting displaced air by the hydraulic compressed-air :l'eed line'connecting therewith, of a means in said feed line for automatically exhausting displaced air when the tank is filling with a liquid; means for closing the exhaust and thereby placing the confined displaced air under compression; and means actuated by the hydraulic pressure in the tank for reducing or cutting off the feed of compressed. air through the feed line into the tank, last naincdmeans operating to restore :eed of compressed-air in re spouse to a reduction of whereby t e pressur tially u ly anon 8, The combination 1th a filter tank, of a vertically disposed cylinder connecting there with having; an e cape valve in its discharge portion, auxiliary compressed air connecting with cylinder, said ipe having a valve, a float within. the cylinder by hydraulic pressure in tank. and having a valve for closing the passage of air throu h said cylinder, wherepressure in the tank tank is substanby displaced air is p aced under compression 9 in the cylinder, and a dash-pot connecting with the cylinder and actuated by the compressed displaced air for actuating the valve in. the auxiliary air pipe by variations of the hydraulic pressure in the tank.

9. The combination with a filter tank, of a cylinder having one end connect-ingtherewith and having another portion provided with a valve for the escape of the air displaced when the tank is filling, a float within the cylinder having a valve adapted to seat in the cylinder and close the passage for the displaced air, a dash-pot connecting with the cylinder, an auxiliary compressed-air pipe connecting with'said cylinder and having a regulable valve, and a lever on the valve and connected tothe movable member of the dash-pot, said float adapted to be actuated ssui'e in the tank when said tank is filled to prevent the passage of displaced air through the cylinder whereby said air becomes compressed and actuates the dash-pot to reduce or cut oil the supply of aux liary compressed-air, said dash-pot operating to open said valve to admit an au;:- iliary air pressure into the tank when'the hydraulic pressure of the tank becomes reduced, I,

1.0. The combination with a filter tank, of a cylinoer connecting therewith and forming a passage for the air displaced when the tank is filled, said cylinder having an upwardly opening valve in its outer portion and having an internal valve-seat in an intermediate portion of the cylinder, a. float operable in the cylinder and exposed" to the hydraulic pressure inlhe cylinder, said float having a stem with a valve thereon adapted to seat upwardly against said valve-seat,

said valve being normally open to permit l'lO the escape of displaced air and adapted to be closed bysthe rise of the float when the tank is filled and the float is subjected to the hydraulic pressure in the tank, a dashpot connecting with the tank and receiving compressed displaced air, said dash-pot having a piston portion with an extending stem, an auxiliary compressed-air pipe connecting with the cylinder, a valve in said pipe for regulating the admission of the compressed,- air into the cylinder, a lever connected to the valve and also to the stem of the dashpot whereby the valve is maintained closed by the hydraulic pressure in the tank, and a weight on the lever operating to retract the piston of the dash-pot and open the valve in the air pipe coordinately with the reducl tion of hydraulic pressure in the filter tank.

1L. The combination with a filter tank, of a cylinder connecting with the upper portion thereof, said cylin der' having a fixed internal guide a counterweighted puppetvalve at the upper end of the cylinder adapted to open upwardly under the influence of air displaced whenthe tank is filled with liquid, a hollow float within the cylinder and inclosing said guide, said float being open at its bottom and having a rigid stem extending from its top, a valve on said stem adapted to close upwardly, an auxiliary compressed-air pipe connecting with the cylinder, a dash-pot also connecting with the 'cyliiider below the second-named valve, said dash-pot having a piston portion with an extended stem and said float being actuated by the hydraulic pressure in the tank when the, tank is filled to cut off the escape of displaced air from the cylinder whereby said airis compressed in the cylinder and en'teis the dash-pot to move the piston thereof, a valve in the auxiliary air-pipe adapted to be held in a closed position by hydraulic pressure in the tank, and means for opening said valve and admitting compressed air into the cylinder coordinately with the reduction of hydraulic pressuretin the tank. In testimony whereof I 'afiix my signature in presence of two witnesses.

DAVID J. KELLY. Witnesses ALBERT L. GENT'ER,

C. B. FELT, 

